AMAZING GREYSTONE | Greystone Mansion, also known as the Doheny Mansion, is a Tudor-style mansion on a landscaped estate with distinctive formal English gardens, located in Beverly Hills, California. The architect Gordon Kaufmann designed the residence and ancillary structures. Construction was completed in 1928. The estate was a gift from oil tycoon Edward L. Doheny to his son, Edward "Ned" Doheny, Jr., and his family. Following the purchase of the estate by the City of Beverly Hills in 1965, the property became a city park in 1971 and was subsequently added to the National Register of Historic Places in 1976 as Doheny Estate/Greystone. The house and grounds are often used in filmmaking and television production. The house's descending staircase is one of the most famous sets in Hollywood. The 55-room, 46,000 square-foot residence sits on 16 acres. On February 16, 1929, four months after Ned Doheny, his wife Lucy and their five children moved into Greystone, Ned died in his bedroom in a murder-suicide with his secretary, Hugh Plunket. Both were involved in the trial of Ned's father in the Teapot Dome scandal.